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|Title:||RADIATION ASSISTED THERMONUCLEAR BURN WAVE DYNAMICS IN HEAVY ION FAST IGNITION OF CYLINDRICAL DT FUEL TARGET|
Nazir, R. Tariq
|Keywords:||ЭБ БГУ::ЕСТЕСТВЕННЫЕ И ТОЧНЫЕ НАУКИ::Физика|
|Abstract:||Dynamics of thermonuclear burn wave propagation assisted by thermal radiation precursor in a heavy ion fast ignition of cy-lindrical deuterium-tritium (DT) fuel target are studied by two dimensional radiation hydrodynamic simulations using Multi-2D code. Thermal radiations, as they propagate ahead of the burn wave, suffer multiple reflections and preheat the fuel, are found to play a vital role in burn wave dynamics. After fuel ignition, the burn wave propagates in a steady state manner for some time. Multiple reflection and absorption of radiation at the fuel-tamper interface, fuel ablation and radial implosion driven by ablative shock and fast fusion rates on the fuel axis, at relatively later times, result into filamentary wave front. Strong pressure gradients are developed and sausage like structures behind the front are appeared. The situation leads to relatively reduced and non-uniform radial fuel burning and burn wave propagation. The fuel burning due to DD reaction is also taken into account and over-all fusion energy and fusion power density, due to DT and DD reactions, during the burn wave propagation are determined as a function of time.|
|Appears in Collections:||2015. Взаимодействие излучений с твердым телом|
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